Functional Diagram - Quectel EG91 Series Hardware Design

AT Commands
Network Indication
Antenna Interfaces
Physical Characteristics
Temperature Range
Firmware Upgrade
RoHS
NOTES
1)
1. GNSS antenna interface is only supported on EG91-NA/-NS/-V/-EC.
2)
2. Within operationtemperature range, the module is 3GPP compliant.
3)
3. Within extended temperature range, the module remains the ability to establish and maintain a
voice, SMS, data transmission, emergency call, etc. There is no unrecoverable malfunction. There
are also no effects on radio spectrum and no harm to radio network. Only one or more parameters
like P might reduce in their value and exceed the specified tolerances. When the temperature
out
returns to normal operationtemperature levels, the module will meet 3GPP specificationsagain.
4. "*" means under development.
The following figure shows a block diagram of EG91 and illustrates the major functional parts.
 Power management
 Baseband
 DDR+NAND flash
 Radio frequency
 Peripheral interfaces
EG91_Hardware_Design
Protocol: NMEA 0183
Compliant with 3GPP TS 27.007, 27.005 and Quectel enhanced AT
commands
NETLIGHTpin for network activitystatusindication
Including main antenna interface (ANT_MAIN), Rx-diversity antenna
(ANT_DIV) interface and GNSS antenna interface(ANT_GNSS)
Size: (29.0±0.15)mm × (25.0±0.15)mm × (2.3±0.2)mm
Package: LGA
Weight: approx. 3.8g
Operation temperature range: -35°C ~ +75°C
Extended temperature range: -40°C ~ +85°C
Storage temperature range: -40°C ~ +90°C
USB interface orDFOTA*
All hardware components are fully compliant with EU RoHS directive

2.3. Functional Diagram

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LTE Module Series
EG91 Hardware Design
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